Add Github Action workflow

Author: greimela

.github/workflows/codeql.yml

@@ -0,0 +1,86 @@
+name: Docker Build
+
+on:
+    push:
+        branches:
+            - master
+
+env:
+    REGISTRY_IMAGE: ghcr.io/${{ github.repository_owner }}/btcpayserver
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+            - name: Docker meta
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY_IMAGE }}
+            - name: Set up QEMU
+              uses: docker/setup-qemu-action@v3
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v1
+            - name: Login to GitHub Container Registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ghcr.io
+                  username: ${{ github.repository_owner }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+            - name: Build and push
+              id: build
+              uses: docker/build-push-action@v5
+              with:
+                  context: .
+                  platforms: linux/amd64,linux/arm64
+                  labels: ${{ steps.meta.outputs.labels }}
+                  outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+                  build-args: |
+                      GIT_COMMIT=${{ github.sha }}
+                      CONFIGURATION_NAME=Altcoins-Release
+            - name: Export digest
+              run: |
+                  mkdir -p /tmp/digests
+                  digest="${{ steps.build.outputs.digest }}"
+                  touch "/tmp/digests/${digest#sha256:}"
+            - name: Upload digest
+              uses: actions/upload-artifact@v4
+              with:
+                  name: digests
+                  path: /tmp/digests/*
+                  if-no-files-found: error
+                  retention-days: 1
+
+    merge:
+        runs-on: ubuntu-latest
+        needs:
+            - build
+        steps:
+            - name: Download digests
+              uses: actions/download-artifact@v4
+              with:
+                  name: digests
+                  path: /tmp/digests
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+            - name: Docker meta
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY_IMAGE }}
+            - name: Login to GitHub Container Registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ghcr.io
+                  username: ${{ github.repository_owner }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+            - name: Create manifest list and push
+              working-directory: /tmp/digests
+              run: |
+                  docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+                    $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+            - name: Inspect image
+              run: |
+                  docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}